Hoymiles MI-1000 User manual

MI
User Manual
MICROI
(Model: MI
MI
-1000/MI-1200/MI-1500
User Manual
MICROI
NVERTER
(Model: MI
-1000/MI-1200/MI-1500)
1

MI-1000/MI-1200/MI-1500
2
About Microinverter
This system is composed of a group of Microinverters that convert direct current (DC) into
alternating current (AC) and feeds it into the public grid. The system is designed for the
incorporation of one Microinverter for four photovoltaic modules. Each Microinverter works
independently that guarantees the maximum power generation of each photovoltaic
module. This setup enables user to control the production of a single photovoltaic module
directly, consequently improving the flexibility and reliability of the system.
About the manual
This manual contains important instructions for the MI-1000/MI-1200 Microinverter and
must be read in its entirety before installing or commissioning the equipment. For safety,
only qualified technician, who has received training or has demonstrated skills can install
and maintain this Microinverter under the guide of this document.
Other Information
Product information is subject to change without notice. User manual will be updated
frequently, please refer to Hoymiles official website at www.hoymiles.com for the latest
version.

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Contents
1. Important Notes ..................................................................................................................................... 5
1.1 Product Range............................................................................................................................................. 5
1.2 Target Group ................................................................................................................................................ 5
1.3 Symbols Used .............................................................................................................................................. 5
2. About Safety ............................................................................................................................................ 6
2.1 Important Safety Instructions ................................................................................................................ 6
2.2 Explanation of Symbols ........................................................................................................................... 7
3. About Product ........................................................................................................................................ 7
3.1 About 4 in 1 unit .......................................................................................................................................... 7
3.2 Highlights ....................................................................................................................................................... 8
3.3 Terminals Introduction .............................................................................................................................. 8
3.4 Dimension...................................................................................................................................................... 8
4. Function .................................................................................................................................................... 9
4.1 Work Mode .................................................................................................................................................... 9
5. Installation ............................................................................................................................................ 10
5.1 Accessories ................................................................................................................................................ 10
5.2 Installation Precaution 图片 ................................................................................................................. 11
5.3 Space Distance Required 图片........................................................................................................... 11
5.4 Preparation ................................................................................................................................................. 12
5.5 Installation Steps ...................................................................................................................................... 13
6. Troubleshooting.................................................................................................................................. 17
7. Sample Wiring Diagram .................................................................................................................... 20
8. Decommissions .................................................................................................................................. 21
8.1 Decommissions ......................................................................................................................................... 21
8.2 Storage and Transportation ................................................................................................................. 21
8.3 Disposal ........................................................................................................................................................ 21
9. Technical Data ..................................................................................................................................... 22
9.1 DC Input ....................................................................................................................................................... 22
9.2 AC Ouput ..................................................................................................................................................... 22
9.3 Efficiency, Safety and Protection ....................................................................................................... 23
9.4 General Data .............................................................................................................................................. 23
Appendix 1: ............................................................................................................................................... 24
Installation Map........................................................................................................................................ 24

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1. Important Notes
1.1 Product Range
This manual describes the assembly, installation, commissioning, maintenance
and failuresearch of the following model of Hoymiles Microinverter:
 MI-1000
 MI-1200
 MI-1500
Note: “1000” means 1000W, “1200” means 1200W, “1500” means 1500W.
1.2 Target Group
This manual is only for qualified technician, who has been trained or has
demonstrated skills can install and maintain this Microinverter under the guide of
this document for safety purpose.
1.3 Symbols Used
The safety symbols in this user manual are show as below.
Symbol Usage
Indicates a hazardous situation that can result in deadly electric
shock hazards, other serious physical injury, or fire hazards.
Indicates directions which must be fully understood and followed in
entirety in order to avoid potential safety hazards including
equipment damage or personal injury.
Indicates this points out that the described operation must not be
carried out. The reader should stop, use caution and fully
understand the operations explained before proceeding.

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2. About Safety
2.1 Important Safety Instructions
The MI-1000/MI-1200/MI-1500 Microinverter is designed and tested according to
international safety requirements (IEC62109-1/-2, VDE4105, VDE0126, AS
4777.1 /.2& AS 3000). However, certain safety precautions must be taken when
installing and operating this inverter. The installer must read and follow all
instructions, cautions and warnings in this installation manual.
 All operations including transport, installation, start-up and maintenance, must be carried out by
qualified, trained personnel. 
 Before installation, check the unit to ensure free of any transport or handling damage, which could
affect insulation integrity or safety clearances. Choose installation location carefully and adhere to
specified cooling requirements. Unauthorized removal of necessary protections, improper use, incorrect
installation and operation may lead to serious safety and shock hazards or equipment damage.
 Before connecting the Microinverter to the power distribution grid, contact the local power distribution
grid company to get appropriate approvals. This connection must be made only by qualified technical
personnel. It is the responsibility of the installer to provide external disconnect switches and Over
current Protection Devices (OCPD).
 Only one photo voltaic module can be connected to one input of the inverter. Do not connect
batteries or other sources of power supply. The inverter can be used only if all the technical
characteristics are observed and applied.
 Do not install the equipment in adverse environment conditions such as flammable, explosive,
corrosive, extreme high or low temperature, and humid. Do not use the equipment when the safety
devices do not work or disabled.
 Use personal protective equipment, including gloves and eye protection during the installation.
 Inform the manufacturer about non-standard installation conditions.
 Do not use the equipment if any operating anomalies are found. Avoid temporary repairs.
 All repairs should be carried out using only qualified spare parts, which must be installed in
accordance with their intended use and by a licensed contractor or authorized Hoymiles service
representative.
 Liabilities arising from commercial components are delegated to their respective manufacturers.
 Anytime the inverter has been disconnected from the public network, please be extremely caution as
some components can retain charge sufficient to create a shock hazard. Prior to touching any part of the
inverter please ensure surfaces and equipment are under touch safe temperatures and voltage
potentials before proceeding.
 Hoymiles accepts No liability for damage from incorrect or improper operation
 Electrical Installation & Maintenance shall be conducted by licensed electrician and shall comply with
Local Wiring Rules

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2.2 Explanation of Symbols
Symbol Usage
Treatment
To comply with European Directive 2002/96/EC on waste Electrical and
Electronic Equipment and its implementation as national law, electrical
equipment that has reached the end of its life must be collected separately
and returned to an approved recycling facility. Any device no longer
required must be returned to an authorized dealer or approved collection
and recycling facility.
Caution
Do not come within 8 inches (20cm) of the microinverter for any length of
time while it is in operation.
Danger of high voltages
Danger to life due to high voltage in the microinverter.
Beware of hot surface
The inverter can become hot during operation. Avoid contact with metal
surfaces during operation.
CE mark
The inverter complies with the requirements of the Low Voltage Directive
for the European Union.
Read manual first
Please read the installation manual first before installation, operation and
maintenance.
3. About Product
3.1 About 4 in 1 unit
“The world’s First Single-phase Microinverter” designed for 4 solar panels with dual
MPPTs with wide DC input operating voltage range(16-60V) and low start-up voltage
(22V only).
Hoymiles 4 in 1 Microinverter MI-1000/MI-1200/MI-1500 is “The Best PowerDensity
Microinverter” ever in solar industry with extremely light weight-only3.75KG including
integrated DC&AC cables;3-phase wiring is also easy to be configured by Hoymiles 4
in 1 Microinverter for MW size commercial PV power stations(one of the world’s
biggest Microinverter projects configured by Hoymiles Microinverter is 3.6MW).

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3.2 Highlights
- Maximum output power up to 1000/1200/1500W; Adapted to 60 & 72 cells PV
panels.
- Peak efficiency 96.60%; CEC weighted efficiency 96.50%.
- Static MPPT efficiency 99.80%; Dynamic MPPT efficiency 99.76% in overcast
weather.
- High reliability: NEMA6 (IP67) enclosure; 6000V surge protection.
3.3 Terminals Introduction
Object Description
A AC Connector (male)
B AC Connector (Female)
C DC Connectors

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3.4 Dimension
4. Function
4.1 Work Mode
Normal: Under this mode, Microinverter is operating normally and convert DC power
into AC power to support the house loads and feed in to Public Grid.
Anti-reflux Control: Under this mode Microinverter’s generation is limit base on the
current house loads, there will be no extra power feed in to the Public Grid.
Stand By: There are several circumstance that Microinverter will stay in Stand by
mode:
- The current condition is contradicted with Microinverter operating requirement.
- No house loads or the Export control value has been set as “0” on the DTU under
the Anti-Reflux Control mode.
5. Installation
5.1 Accessories

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Object Description
A AC Extension Cable
B AC End Cable (Female) , 2m 12 AWG cable.
C AC Female Connector
D DC Male Connector
E AC Male End Cap, IP67.
F AC Female End Cap, IP67.
G Screw, 2 pcs of M8*25 screws to tighten Microinverter on the frame.
H AC/DC Connector Unlock Tool.
I DC Extension Cable(optional)
5.2 Installation Precaution
Please install the Microinverter and all DC connections under the PV module to
avoiding direct sunlight, rain exposure, snow layup, UV etc.

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5.3 Space Distance Required
Please install the Microinverter at least 500mm above the ground/roof. Please
contact with Hoymiles Tech. engineer if there is any special circumstance.

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5.4 Preparation
Installation of the equipment is carried out based on the system design and the
place in which the equipment is installed.
- The installation must be carried out with the equipment disconnected from the
grid (power disconnect switch open) and with the photovoltaic modules
shaded or isolated.
- Referring to the Technical Data to make sure the environmental conditions fit
the microinverter’s requirement (degree of protection, temperature, humidity,
altitude, etc.)
- To avoid power derating due to an increase in the microinverter internal
temperature, do not expose it to direct sunlight.
- To avoid overheating, always make sure the air flow around the inverter is not
blocked.
- Do not install in places where gasses or flammable substances may be
present.
- Avoid electromagnetic interference that can compromise the correct operation
of electronic equipment.
When choosing the position of installation, comply with the following conditions:
Install only on structures specifically conceived for photovoltaic modules
(supplied by installation technicians).
Install Microinverter underneath of the photovoltaic modules to make sure it
works in the shadow. If this condition cannot be met, might trigger the inverter
production derating.

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Fig.1 InstallationPosition of Microinverter
5.5 Installation Steps
Step 1. Install Microinverter
a.Mark the approximate center of each panel on the frame.
b. Install the Microinverter shown as below two methods. The silver cover side
should be up.
Method 1: Secure with 1 screw
Method 2: Secure with 2 screws

MI
c. Tighten the s
crew
Observe the certification documents concerning the maximum number of
Micro-
inverters permitted for installation at each cable section!
The Microinverter must be under the module, out of long
sunlight or rain.
Step 2
. Connect AC Cables of Microinverter
a.
Plug the AC connector of the first microinverter into the connector of the second
microinverter, and so for the rest, to form a continuous AC branch circuit
b.
Install the AC End Cap on the open AC connector of the last microinverter in the
AC branch circuit.
Step 3.
Connect AC End Cable
a.
Connect the AC Female connector on the side of AC End cable to the
adjacent Microinverter
b.
Connect th
and wire it to the
local grid
completed.
Note: Brown Wire: L Blue Wire: N Yellow/Green Wire:
Ground
MI
-1000/MI-1200/MI-1500
crew
and fix the inverter
on the frame (for method 2
Observe the certification documents concerning the maximum number of
inverters permitted for installation at each cable section!
The Microinverter must be under the module, out of long
-
term exposure to direct
sunlight or rain.
. Connect AC Cables of Microinverter
Plug the AC connector of the first microinverter into the connector of the second
microinverter, and so for the rest, to form a continuous AC branch circuit
Install the AC End Cap on the open AC connector of the last microinverter in the
Connect AC End Cable
Connect the AC Female connector on the side of AC End cable to the
adjacent Microinverter
’s AC Male connector.
Connect the other side of the AC End Cable to the distribution box
local grid
network. Close the distribution box
after the wiring is
Note: Brown Wire: L Blue Wire: N Yellow/Green Wire:
13
on the frame (for method 2
only).
Observe the certification documents concerning the maximum number of
term exposure to direct
Plug the AC connector of the first microinverter into the connector of the second
microinverter, and so for the rest, to form a continuous AC branch circuit
.
Install the AC End Cap on the open AC connector of the last microinverter in the
Connect the AC Female connector on the side of AC End cable to the
e other side of the AC End Cable to the distribution box
,
after the wiring is
Note: Brown Wire: L Blue Wire: N Yellow/Green Wire:

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Step 4. Create an Installation Map
a. Peel the removable serial number label from each microinverter(The position of the
label is shown as below).
b.Affix the serial number label to the respective location on theinstallation map (Please refer to
the appendix for the installation map).
Step 5. Connect PV Modules

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a. Mountthe PV modules above themicroinverters.
b. Connect the PV modules’ DC cablesto theDCinputsideofthemicroinverter.
The recommended installation need to keep the Microinverter underneath the
photovoltaic modules, so that the Microinverters can operate in the shadow. Direct
sunlight exposure may effect on the performance as well as the lifetime to the
Microinverter.
The length of the DC cable that connecting the Microinverter and module need to
be less than 3m.
Step 6. Energize the System
a. Turn on the AC breaker for the branch circuit.
b.Turn on the main AC breakerfor the house. Your system will start to generate
power about two-minute wait time.
Step 7. Monitoring System Set Up
Refer to the DTU User Manual or the DTU Quick Install Guide to Install the DTU and
Set up Monitoring System.

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6. Troubleshooting
6.1 Troubleshooting List
Status Code Solution
01 Please contact your installer.
02 Please contact your installer.
03 Waiting for AC voltage recover, if the code appears frequently
please contact your installer to check the AC wiring.
04 Please Contact your installer, and provide Panel specs.
05 Please contact your installer to check the DC side installation and
PV configuration.
06 Please contact your installer.
07 Please check the am temperature and installation environment.
08 Waiting for AC voltage recover, if the code appears frequently
please contact your installer to check the AC wiring.
09 Waiting for AC frequency recover, if the code appears frequently
please contact your installer.
10 Please try firmware upgrade.
12 Please try reboot or firmware upgrade.
13 Please try reboot or firmware upgrade.
14 Please contact your installer.
15 Waiting for AC voltage recover, if the code appears frequently
please contact your installer.
16 Please contact your installer.
20 Please try firmware upgrade.
6.2 Status LED Indicator
The LED flashes six times at start up. All green flashes indicate normal start up.

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 Flashing Slow Green(2s gap): Producing power and communicating with DTU.
 Flashing Fast Green (4s gap): Producing power and not communicating with DTU.
 Flashing Red(1s gap): Not producing power ACgrid invalid (Voltage or frequency out
of range).
 Flashing Red (always): GFDI Fault.The LED will remain red and the fault will continue
to be reported by the DTU.
6.3 On-site inspection (For qualified installer only)
To troubleshoot an inoperable microinverter, follow the steps in the order shown.
1. Verify the utility voltage and frequency are within ranges shown in the in appendix
Technical Data of this microinverter.
2. Check the connection to the utility grid. Verify utility power is present at the inverter in
question by removing AC, then DC power. Never disconnect the DC wires while the
microinverter is producing power. Re-connect the DC module connectors and watch for
five short LED flashes.
3. Check the AC branch circuit interconnection between all the microinverters. Verify each
inverter is energized by the utility grid as described in the previous step.
4. Make sure that any AC breaker are functioning properly and are closed.
5. Check the DC connections between the microinverter and the PV module.
6. Verify the PV module DC voltage is within the allowable range shown in appendix
Technical Data of this manual.
7. If the problem persists, please call Hoymiles customer support.
Warning
 Do not try to repair the microinverter. If the troubleshooting fails, please return it to the
factory for replacement.
6.4 Routine Maintenance
 Only authorized personnel are allowed to carry out the maintenance operations and
are responsible to report any anomalies.
 Always use the personal protective equipment provided by the employer when carry
out the maintenance operation.

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 During normal operation, check that the environmental and logistic conditions are
correct. Make sure that the conditions have not changed over time and that the
equipment is not exposed to adverse weather conditions and has not been covered
with foreign bodies.
 Don’t use the equipment if any problems are found, and restore the normal conditions
after the fault removed.
 Conduct an annual inspection on various components, and clean the equipment with
a vacuum cleaner or special brushes.
Do not attempt to dismantle the Microinverter or make any internal repairs! In order
to preserving the integrity of safety and insulation, the Microinverters are not
designed to allow internal repairs!
The AC output wiring harness (AC drop cable on the Micro- inverter) cannot be
replaced. If the cord is damaged the equipment should be scrapped.
Maintenance operations must be carried out with the equipment disconnected
from the grid (power switch open) and the photovoltaic modules obscured or
isolated, unless otherwise indicated.
For cleaning, Do not use rags made of filamentary material or corrosive products that
may corrode parts of the equipment or generate electrostatic charges.
Avoid temporary repairs. All repairs should be carried out using only genuine spare
parts.

MI
7.
Sample Wiring Diagram
DTU connects the power production of each microinverter. If the
current is going to exceed 16 A, DTU will send stop signal to one or more
microinverters
Each branch should provide a 20A circuit breaker, but no need for
protection unit
MI
-1000/MI-1200/MI-1500
Sample Wiring Diagram
Fig.2SinglePhase Wiring Diagram
Fig.3 Three phase wiring diagram
DTU connects the power production of each microinverter. If the
current is going to exceed 16 A, DTU will send stop signal to one or more
microinverters
to let the asymmetry current lower than 16A.
Each branch should provide a 20A circuit breaker, but no need for
protection unit
.
19
DTU connects the power production of each microinverter. If the
asymmetry
current is going to exceed 16 A, DTU will send stop signal to one or more
Each branch should provide a 20A circuit breaker, but no need for
central

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8. Decommissions
8.1 Decommissions
Disconnect the inverter from DC input and AC output; remove all connection cable
from the Microinverter; remove the Microinverter from the frame.
Please pack the Microinverter with the original packaging, or use the carton box that
can afford 5kg weight and can be fully closed if the original packaging is no longer
available.
8.2 Storage and Transportation
Hoymiles packages and protects individual components using suitable means to
make the transport and subsequent handling easier. Transportation of the equipment,
especially by road, must be carried out by suitable ways for protecting the
components (in particular, the electronic components) from violent, shocks, humidity,
vibration, etc. Please dispose the packaging elements in appropriate ways to avoid
unforeseen injury.
It is the customer’s responsibility to examine the condition of the components
transported. Once receiving the Microinverter, it is necessary to check the container
for any external damage and verify receipt of all items. Call the delivering carrier
immediately if damage or shortage is detected. If inspection reveals damage to the
inverter, contact the supplier, or authorized distributor for a repair/return determination
and instructions regarding the process.
The Microinverter storage temperature is -40-85℃.
8.3 Disposal
- If the equipment is not used immediately or is stored for long periods, check that it
is correctly packed. The equipment must be stored in well-ventilated indoor areas
that do not have characteristics that might damage the components of the
equipment.
- Take a complete inspection when restarting after a long time or prolonged stop.
- Please dispose the equipment properly after scrapping, which are potentially
harmful to the environment, in accordance with the regulations in force in the
country of installation.